Starch - Polyacrylonitrile Copolymers . Properties of Hydrogels
نویسنده
چکیده
Gel sheets prepared from high-viscosity aqueous dispersions of hydrolyzed starch-polyacrylonitrile graft copolymers absorb several hundred times their own weight in water. Viscosity of the disperSiOns can be . reduced to low levels by mechanical shear before the films are cast to give solutions which yield water'soluble .films. These soluble films can be readily cross-linked to again form highly swellable but nonsoluble gel sheets by: (a) heating, (b) irradiating with 60CO. and (c) aging at high relative humidity.
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